Somatic sensory responses in the rostral sector of the posterior group (POm) and in the ventral posterior medial nucleus (VPM) of the rat thalamus

The rodent barrel field cortex integrates somatosensory information from two separate thalamic nuclei, the ventral posterior medial nucleus (VPM) and the rostral sector of the posterior complex (POm). This paper compares the sensory responses of POm and VPM cells in urethane‐anesthetized rats as a first step in determining how cortex integrates multiple sensory pathways.

[1]  C. Woolsey,et al.  Organization of the mammalian thalamus and its relationships to the cerebral cortex. , 1949, Electroencephalography and clinical neurophysiology.

[2]  G. H. Bishop.  The relation between nerve fiber size and sensory modality: phylogenetic implications of the afferent innervation of cortex. , 1959, The Journal of nervous and mental disease.

[3]  E. Perl,et al.  Somatic stimuli exciting spinothalamic projections to thalamic neurons in cat and monkey. , 1961, Experimental neurology.

[4]  I. T. Diamond,et al.  SINGLE NEURON INVESTIGATION OF SENSORY THALAMUS OF THE OPOSSUM. , 1964, Journal of neurophysiology.

[5]  R. Emmers.  Organization of the first and the second somesthetic regions (SI and SII) in the rat thalamus , 1965, The Journal of comparative neurology.

[6]  W. C. Hall,et al.  Organization of the posterior dorsal thalamus of the hedgehog , 1967, The Journal of comparative neurology.

[7]  T. Woolsey,et al.  The structural organization of layer IV in the somatosensory region (S I) of mouse cerebral cortex , 1970 .

[8]  C. Welker.  Microelectrode delineation of fine grain somatotopic organization of (SmI) cerebral neocortex in albino rat. , 1971, Brain research.

[9]  M. J. Curry.  The exteroceptive properties of neurones in the somatic part of the posterior group (PO). , 1972, Brain research.

[10]  P. Waite.  Somatotopic organization of vibrissal responses in the ventro‐basal complex of the rat thalamus , 1973, The Journal of physiology.

[11]  H. Killackey.  Anatomical evidence for cortical subdivisions based on vertically discrete thalamic projections from the ventral posterior nucleus to cortical barrels in the rat. , 1973, Brain research.

[12]  C. Welker.  Receptive fields of barrels in the somatosensory neocortex of the rat , 1976, The Journal of comparative neurology.

[13]  H. Loos.  Barreloids in mouse somatosensory thalamus , 1976, Neuroscience Letters.

[14]  S. Wise,et al.  Cells of origin and terminal distribution of descending projections of the rat somatic sensory cortex , 1977, The Journal of comparative neurology.

[15]  L. Kruger,et al.  The organization of thalamocortical relay neurons in the rat ventrobasal complex studied by the retrograde transport of horseradish peroxidase , 1977, The Journal of comparative neurology.

[16]  E. G. Jones,et al.  Differential thalamic relationships of sensory‐motor and parietal cortical fields in monkeys , 1979, The Journal of comparative neurology.

[17]  M. Armstrong‐James,et al.  Carbon fibre microelectrodes , 1979, Journal of Neuroscience Methods.

[18]  M. Armstrong‐James,et al.  A method for etching the tips of carbon fibre microelectrodes , 1980, Journal of Neuroscience Methods.

[19]  P. Hand,et al.  First somatosensory cortical columns and associated neuronal clusters of nucleus ventralis posterolateralis of the cat: An anatomical demonstration , 1981, The Journal of comparative neurology.

[20]  M. Deschenes,et al.  Intracortical arborizations and receptive fields of identified ventrobasal thalamocortical afferents to the primary somatic sensory cortex in the cat , 1981, The Journal of comparative neurology.

[21]  K. Itoh,et al.  Cells of different sizes in the ventral nuclei project to different layers of the somatic cortex in the cat , 1982, Brain Research.

[22]  J. Besson,et al.  Spinal afferents to the ventrobasal thalamic complex in the rat: an anatomical study using wheat-germ agglutinin conjugated to horseradish peroxidase , 1983, Brain Research.

[23]  T. Woolsey,et al.  Computer‐assisted analyses of barrel neuron axons and their putative synaptic contacts , 1983, The Journal of comparative neurology.

[24]  H. Killackey,et al.  Evidence for the complementary organization of callosal and thalamic connections within rat somatosensory cortex , 1984, Brain Research.

[25]  J. Chapin,et al.  Mapping the body representation in the SI cortex of anesthetized and awake rats , 1984, The Journal of comparative neurology.

[26]  M. Peschanski,et al.  Trigeminal afferents to the diencephalon in the rat , 1984, Neuroscience.

[27]  D. Simons,et al.  Metabolic and structural correlates of the vibrissae representation in the thalamus of the adult rat , 1985, Neuroscience Letters.

[28]  Joseph E LeDoux,et al.  Topographic organization of convergent projections to the thalamus from the inferior colliculus and spinal cord in the rat , 1987, The Journal of comparative neurology.

[29]  KF Jensen,et al.  Terminal arbors of axons projecting to the somatosensory cortex of the adult rat. I. The normal morphology of specific thalamocortical afferents , 1987, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[30]  D. Simons,et al.  Thalamic and corticocortical connections of the second somatic sensory area of the mouse , 1987, The Journal of comparative neurology.

[31]  R. Spreafico,et al.  SII-projecting neurons in the rat thalamus: a single- and double-retrograde-tracing study. , 1987, Somatosensory research.

[32]  J. Chapin,et al.  Corticocortical connections within the primary somatosensory cortex of the rat , 1987, The Journal of comparative neurology.

[33]  M. Armstrong‐James,et al.  Spatiotemporal convergence and divergence in the rat S1 “Barrel” cortex , 1987, The Journal of comparative neurology.

[34]  M. Armstrong‐James,et al.  Influence of anesthesia on spontaneous activity and receptive field size of single units in rat Sm1 neocortex , 1988, Experimental Neurology.

[35]  J. Besson,et al.  Somatotopic reciprocal connections between the somatosensory cortex and the thalamic Po nucleus in the rat , 1988, Brain Research.

[36]  Karl F. Jensen,et al.  Evidence for two complementary patterns of thalamic input to the rat somatosensory cortex , 1988, Brain Research.

[37]  D. Simons,et al.  Spatial organization of thalamocortical and corticothalamic projection systems in the rat SmI barrel cortex , 1989, The Journal of comparative neurology.

[38]  T A Woolsey,et al.  Local intra‐ and interlaminar connections in mouse barrel cortex , 1990, The Journal of comparative neurology.

[39]  M. A. Friedman,et al.  Thalamo‐cortical processing of vibrissal information in the rat. I. Intracortical origins of surround but not centre‐receptive fields of layer IV neurones in the rat S1 barrel field cortex , 1991, The Journal of comparative neurology.

[40]  E. Rausell,et al.  Histochemical and immunocytochemical compartments of the thalamic VPM nucleus in monkeys and their relationship to the representational map , 1991, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[41]  M Armstrong-James,et al.  Thalamo‐cortical processing of vibrissal information in the rat. II. Spatiotemporal convergence in the thalamic ventroposterior medial nucleus (VPm) and its relevance to generation of receptive fields of S1 cortical “Barrel” neurones , 1991, The Journal of comparative neurology.

[42]  Mara Fabri,et al.  Topography of connections between primary somatosensory cortex and posterior complex in rat: a multiple fluorescent tracer study , 1991, Brain Research.

[43]  E. G. Jones,et al.  Chemically distinct compartments of the thalamic VPM nucleus in monkeys relay principal and spinal trigeminal pathways to different layers of the somatosensory cortex , 1991, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[44]  H. Killackey,et al.  Thalamic processing of vibrissal information in the rat. I. Afferent input to the medial ventral posterior and posterior nuclei , 1991, The Journal of comparative neurology.

[45]  F. Ebner,et al.  Somatic sensory responses in the rostral sector of the posterior group (POm) and in the ventral posterior medial nucleus (VPM) of the rat thalamus: Dependence on the barrel field cortex , 1992, The Journal of comparative neurology.